[summary] Java collection (Set, List, Queue)

Java collections brief introduction Java collections can be roughly divided into four systems: set, list, Queue and map. Set represents unordered and unrepeatable collections; List represents an ordered and repeated set; Map represents a set with mapping relationship, and Java 5 adds a Queue system set to represent a Queue set implementation ...

Posted by nickdd on Tue, 21 Sep 2021 21:54:37 +0200

Deeply understand the underlying data structure of Redis List queue

Deeply understand the underlying data structure of Redis List queue CentOS 7 installs redis6.25 in combination with the docker image configuration method (redis.conf file is attached) list underlying data structure: linkedList linked list Zip list zip list quickList Linked list: LinkedList The two-way linked list of the leading nod ...

Posted by petersro on Mon, 20 Sep 2021 12:32:35 +0200

C++ STL summary list

1.list memory structure List is a two-way linked list, and the elements are not stored continuously in memory. It will request and release the space of an element every time it inserts and deletes an element. 2. Capacity operation functionfunctionbool empty()Check whether the container is emptysize_t size()Returns the number of elements in ...

Posted by upit on Wed, 15 Sep 2021 02:21:09 +0200

Java multithreaded batch split List import database

1, Foreword Two days ago, we did an import function. The import started very slowly. It took more than one minute to import 2w pieces of data. Later, we optimized it bit by bit, from directly linking the list into Mysql, assigning the list into Mysql, and multi threading the list into Mysql. Time is getting less and less. It was very cool, and ...

Posted by marshdabeachy on Wed, 08 Sep 2021 04:27:50 +0200